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yunilka28
03.11.2020 •
Mathematics
M is directionly proptional to r squared
when r=2, m=14
A)work out the value of m when r is 12
b) work out the value or r when m is 224
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Ответ:
9514 1404 393
A) 504
B) 8
Step-by-step explanation:
The statement of proportionality can be written as the equation ...
m = kr²
Then we can find k from ...
k = m/r² = 14/2² = 7/2
That is, ...
m = (7/2)r²
__
Using this relation, we can find m for r=12:
m = (7/2)·12² = 7·72
m = 504 . . . for r = 12
__
And, we can use the same equation to solve for r when m=224.
224 = 7/2·r²
r² = 64
r = √64
r = 8 . . . for m = 224
Ответ:
(5, 13)
Step-by-step explanation:
(4, 8)
translation rule(x + 1, y + 5)
(4 + 1, 8 + 5)
(5, 13)
hope this helps